Vulnerability Description
LibVNC before 0.9.12 contains a heap out-of-bounds write vulnerability in libvncserver/rfbserver.c. The fix for CVE-2018-15127 was incomplete.
CVSS Score
9.8
CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Libvnc Project | Libvncserver | < 0.9.12 |
| Canonical | Ubuntu Linux | 14.04 |
| Debian | Debian Linux | 8.0 |
| Siemens | Simatic Itc1500 Firmware | >= 3.0.0.0, < 3.2.1.0 |
| Siemens | Simatic Itc1500 | - |
| Siemens | Simatic Itc1500 Pro Firmware | >= 3.0.0.0, < 3.2.1.0 |
| Siemens | Simatic Itc1500 Pro | - |
| Siemens | Simatic Itc1900 Firmware | >= 3.0.0.0, < 3.2.1.0 |
| Siemens | Simatic Itc1900 | - |
| Siemens | Simatic Itc1900 Pro Firmware | >= 3.0.0.0, < 3.2.1.0 |
| Siemens | Simatic Itc1900 Pro | - |
| Siemens | Simatic Itc2200 Firmware | >= 3.0.0.0, < 3.2.1.0 |
| Siemens | Simatic Itc2200 | - |
| Siemens | Simatic Itc2200 Pro Firmware | >= 3.0.0.0, < 3.2.1.0 |
| Siemens | Simatic Itc2200 Pro | - |
Related Weaknesses (CWE)
References
- http://www.securityfocus.com/bid/106825Broken Link
- https://cert-portal.siemens.com/productcert/pdf/ssa-390195.pdfPatchThird Party Advisory
- https://github.com/LibVNC/libvncserver/commit/15bb719c03cc70f14c36a843dcb16ed69bPatchThird Party Advisory
- https://github.com/LibVNC/libvncserver/issues/273Issue TrackingThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/01/msg00029.htmlThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/10/msg00042.htmlMailing ListThird Party Advisory
- https://usn.ubuntu.com/3877-1/Third Party Advisory
- https://usn.ubuntu.com/4547-1/Third Party Advisory
- https://usn.ubuntu.com/4587-1/Third Party Advisory
- https://www.openwall.com/lists/oss-security/2018/12/10/8ExploitMailing ListThird Party Advisory
- http://www.securityfocus.com/bid/106825Broken Link
- https://cert-portal.siemens.com/productcert/pdf/ssa-390195.pdfPatchThird Party Advisory
- https://github.com/LibVNC/libvncserver/commit/15bb719c03cc70f14c36a843dcb16ed69bPatchThird Party Advisory
- https://github.com/LibVNC/libvncserver/issues/273Issue TrackingThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/01/msg00029.htmlThird Party Advisory
FAQ
What is CVE-2018-20749?
CVE-2018-20749 is a vulnerability with a CVSS score of 9.8 (CRITICAL). LibVNC before 0.9.12 contains a heap out-of-bounds write vulnerability in libvncserver/rfbserver.c. The fix for CVE-2018-15127 was incomplete.
How severe is CVE-2018-20749?
CVE-2018-20749 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2018-20749?
Check the references section above for vendor advisories and patch information. Affected products include: Libvnc Project Libvncserver, Canonical Ubuntu Linux, Debian Debian Linux, Siemens Simatic Itc1500 Firmware, Siemens Simatic Itc1500.